Rethrow RemoteException from dispatchMediaKeyEvent call

Bug: 205124386
Test: Presubmit
Change-Id: I45b7e424f1e84bd5667b14a6dc7e9f740059513f
diff --git a/media/java/android/media/session/MediaSessionManager.java b/media/java/android/media/session/MediaSessionManager.java
index 0d9bd65..371b47f 100644
--- a/media/java/android/media/session/MediaSessionManager.java
+++ b/media/java/android/media/session/MediaSessionManager.java
@@ -617,7 +617,7 @@
             mService.dispatchMediaKeyEvent(mContext.getPackageName(), asSystemService, keyEvent,
                     needWakeLock);
         } catch (RemoteException e) {
-            Log.e(TAG, "Failed to send key event.", e);
+            e.rethrowFromSystemServer();
         }
     }